Tunneling-machine.



W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR. 13, 1912.

1,140,673. Patented May 25, 1915.

4 SHEETS-SHEET l.

.1 qge v THE NORRIS PETERS C0., PHOTG-LITHQ, WASHINGTON. n. c

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W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR.13,1912.

Patented May 25, 1915.

4 SHEETS-SHEET 2.

WITNESSES:

AM Z dmq INVENTOR.

1H5 NORRIS PETERS co.. PHOTOJJTHQ, WASHINGTON, D. C.

M OL C A TTORNEY.

W. W. GIGGEY.

TUNNELING MACHINE.

APPLlCATiON FILED MAR. 13. 1912.

1,140,673. Patented May 25, 1915.

4 SHEETS-SHEET 3.

TNESSES: INVENTOR. 3*" 1-4, 499

THE NORRIS PETERS 60., FHoTO-LITHQ. WASHINGTON. D. c.

W. W. GIGGEY.

TUNNELING MACHINE.

APPLICATION FILED MAR. 13, 1912.

1,140,673. Patented May 25, 1915.

4 SHEETS-SHEET 4- VVI' NESSES. INVENTOR.

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WALTER W. GIGGEY, OF NETHERLAND, COLORl-XIDO.

TUNNELING-MAOI-IINE.

Specification of Letters Patent.

Patented May 25, 1915.

Application filed March 13, 1912. Serial No. 683,520.

To all whom it may concern:

Be it known that I, WALTER W. GIGGEY, a citizen of the United States,residing at Netherland, in the county of Boulder and n State ofColorado, have invented certain new and useful Improvements inTunneling-Machines, of which the following is a specification.

This invention relates to new 'and'useful improvements intunneling-machines and more especially in the class of machines in whicha plurality of reciprocating hammers have a percussive action upon therock which it is desired to penetrate.

The invention has for its object to provide an apparatus of the classnamed in which simplicity of construction is combined with durabilityand thorough practicability in use and which, to this end, consists ofthe features hereinafter described, all of which will be fullyunderstood by reference to the accompanying drawings in the variousviews of which like parts are similarly designated and in which,

Figure 1 represents a plan view of my improved apparatus, Fig. 2 acentral, vertical, longitudinal section thereof, partly in elevation,Fig. 3, a face view of the revoluble head included in the construction,and the thereon arranged percussion hammers, Fig. 1, a cross-sectionalview of the tunnel, showing the structure which supports the screw bymeans of which the machine is advanced into the bore, Fig. 5, anenlarged transverse section taken along the line 55, Fig. 1, Fig. 6, aside elevation of the bearing which supports the revoluble head of themachine,

Fig. 7, a fragmentary section along the line 77, Fig. 6, Fig. 8, asection taken along the line 88 Fig. 7, and Fig. 9, a vertical sectionalview of one of the adjusting supports of the carrying truck.

Referring to the drawings by numerals, the carrying truck 2 is composedof a rec tangular frame 3 which is vertically adjustably mountedupon'four supports 4. The latter, which are best shown in Fig. 9 of thedrawings, consist each of a hollow, cylindrical pedestal 5 which isformed in its upper extremity with an internal screw-thread for thereception, of an adjusting screw 7 which is rotatablysuspended from theframe 3.

The pedestals 5 which are su ported upon revoluble wheels 6, projectwith their upper extremities, into correspondingly shaped sockets"?which are formed in theframe 3,

and the screws 7 are operatively associated with hand-levers 8, by meansof a ratchet and pawl movement in a manner similar to that of theordinary jack-screw. The operatmg levers 8 on the four supports extendnormally in slots 9 cut in the sides of the frame 3 where they areaccessible, when it is desired to elevate all or part of the frame andthe thereon supported operating mechamsm.

The hammer-head 10, which carries the drills 12 by means of which therock is disintegrated, consists of three parallel disks 13, 13 and 13which are firmly secured upon the end of a horizontal, hollow shaft 1 1,which is revolubly mounted in journal bearings 15 upon the truck 2. Thehead 10 is furthermore supported upon a carrier 16, which consists oftwo segmental plates 17 which are'joined below the head 10 and which, inpractice, are movably supported upon the floor of the tunnel by means ofrevoluble wheels 18. The upper ends of the plates 17 connect with thelower extremities of two segmental arms 19 whose upper ends terminate inadjacency to each other above the head and are connected by means of abolt 20. Suspended from the last named member by means of an eye bolt 21is a ring 22 which concentrically surrounds the middle disk 13 and isformed in its inner sur-' face, with a ball run for the reception ofanti-friction balls which engage the concave outer edge of the disk 13The carrier 16, which in the above described manner serves to relievethe bearings 15 of the greater part of the wearingstrain caused by theweight of the head 10, is rigidly connected with the truck 2 by means ofanchor-bolts 23, whose extremities are secured in lugs on the segmentalplates 17.

The pneumatic drills 12, are each composed ofa cylindrical housing 12 inwhich a piston has a reciprocating movement and which is rigidly securedto the disks 13 and 13 The piston rods which protrude beyond theextremities of the housings 12 terminate in chucks 24 which serve toconnect the percussion hammers 25, whose angular shanks 26, projectthrough corresponding openings in the foremost disk 13. The variousdrills 12 are arranged on the head so that thecenters of their chucksare disposed in circular concentric series, and the hammers, whoseserrated working faces are oblong, are secured in, the respective chucksthe supporting structure, While, by regulation of the ad] ustablesupports 4, the frame 3 of the truck 2 may be placed at any selectedelevation or angle of inclination, for the purpose of directing the head10 in accordance With the proposed direction of the tunnel.

It should be understood that While I have shown and described myinvention in the best form now known to me, various changes in the form,proportion and arrangement of the parts comprised in the construction,may be resorted to Without departing from the principle of thisinvention.

I am aWare that it is old to cut the breast of a tunnel in concentric,overlapping circles by the use of vibratory hammers, and I do not claimthis feature broadly, but

What I do claim and desire to secure by Letters-Patent is:

1. In a tunneling machine, the combination With a carrying truck, of aWheeled the truck, a head on said shaft supported i Within the saidbearing, and a plurality of reciprocating hammers on said head.

2. In a tunneling machine, the combination With a carrying truck, of acarrier independently supported in advance thereof and comprising acircular member having surface Wheels and a ball bearing ring suspendedtherein, a shaft rotatably supported upon the truck, a head rotatablysupported upon balls Within the said ring, and a pluriality ofreciprocating hammers on said hea In testimony whereof I have affixed mysignature in presence of two Witnesses.

WALTER W. GIGGEY.

Witnesses:

JOHN R. WOLFE, E. A. LATORRA.

Copies of 'this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. 0.

